DJALEV, L.; BOGDANOV, S. Age and Gender Differences in Evaluating the Pedagogical Usability of E-Learning Materials. English Studies at NBU, Sofia, Bulgaria, v. 5, n. 2, p. 169–189, 2019. DOI: 10.33919/esnbu.19.2.0. Disponível em: https://ojs.nbu.bg/index.php/ESNBU/article/view/265. Acesso em: 3 jul. 2024.